813996 has 24 divisors (see below), whose sum is σ = 2110640. Its totient is φ = 271296.

The previous prime is 813991. The next prime is 813997. The reversal of 813996 is 699318.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 813996.

It is not an unprimeable number, because it can be changed into a prime (813991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3661 + ... + 3876.

2⁸¹³⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

813996 is an abundant number, since it is smaller than the sum of its proper divisors (1296644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813996 is a wasteful number, since it uses less digits than its factorization.

813996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550 (or 7542 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 813996 is about 902.2172687330. The cubic root of 813996 is about 93.3700139271.

The spelling of 813996 in words is "eight hundred thirteen thousand, nine hundred ninety-six".